LOANS AND LEASES (Loan And Lease Portfolio, Net Of Unearned Income, By Segment, Class And Internally Assigned Grade) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Total	$ 10,658,761	$ 10,372,778	$ 10,219,576
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	10,397,796
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,040
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	219,949
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	863
Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	39,113
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,616,152	1,747,774
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,567,073	1,721,118
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	42,117	19,529
Commercial And Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	774
Commercial And Industrial [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,188	7,127
Real Estate [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,611,387	2,472,202
Real Estate [Member] | Consumer Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,549,780	2,399,081
Real Estate [Member] | Consumer Mortgages [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	528
Real Estate [Member] | Consumer Mortgages [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	59,727	68,768
Real Estate [Member] | Consumer Mortgages [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	89	363
Real Estate [Member] | Consumer Mortgages [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,263	3,990
Real Estate [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	622,566	589,752
Real Estate [Member] | Home Equity [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	610,313	577,539
Real Estate [Member] | Home Equity [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	10,766	10,418
Real Estate [Member] | Home Equity [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,487	1,795
Real Estate [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	242,171	259,360
Real Estate [Member] | Agricultural [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	230,891	250,579
Real Estate [Member] | Agricultural [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	10,639	7,909
Real Estate [Member] | Agricultural [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	641	872
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,668,477	1,617,429
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,619,545	1,554,984
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	512
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	39,135	50,304
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	9,285	12,141
Real Estate [Member] | Construction, Acquisition And Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,121,386	945,045
Real Estate [Member] | Construction, Acquisition And Development [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,103,739	920,372
Real Estate [Member] | Construction, Acquisition And Development [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	11,308	17,090
Real Estate [Member] | Construction, Acquisition And Development [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,339	7,583
Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,240,717	2,188,048
Real Estate [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,188,170	2,124,448
Real Estate [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	38,637	45,658
Real Estate [Member] | Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		161
Real Estate [Member] | Commercial Real Estate [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	13,910	17,781
Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	107,447	112,165
Credit Cards [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	107,447	112,165
All Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	428,458	441,003
All Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	420,838	433,333
All Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 7,620	7,465
All Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		102
All Other [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		$ 103